The Chronoscope is a device that analyses ancient photons to allow a glimpse into any event in Earth's distant past. Historian Arnold Potterley is rebuffed when he petitions for use of the Chronoscope to study ancient Carthage. So he commissions the building of a private time-viewing machine.
| Directing | John Gorrie | Director |
| Writing | Isaac Asimov | Story |
| Writing | Jeremy Paul | Adaptation |
| Production | Irene Shubik | Producer |
| Production | George Spenton-Foster | Associate Producer |